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Gestaltor is a visual glTF editor with KTX support. Useful for editing individual glTF files, or batch processing via the command line. Free for non-commercial use on glTF files under 2mb. Subscription removes all limits, and gives access to the command line.
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Install the app, via Steam, Linux, MacOS, or Windows. See installation instructions.
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Open a glTF via File > Open… in the menu bar, for example the Corset.
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In the Content widget, open the Images section and choose one of the textures:
- In the Inspector widget, press Convert image:
- Choose ktx2 as the format. Choose the compression of choice and press Apply.
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There is no progress bar; depending on the image and settings this can take some time.
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Save the finished asset via File > Save in the menu bar.
📝 NOTE: Gestaltor offers many additional tools beyond KTX compression: adjusting glTF assets, editing materials, adding extensions, etc.
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